Thermal circuit-closer.



J. F. SGHEUER. THERMAL CIRCUIT CLOSER. APPLICATION FILED MAY 6, 1913.

1,076,394. j Patented 0.01;. 21, 19 13.

UNITED STATES; PATENT OFFICE.

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e imination or Letters Patent. A ucataamentay'a 1 91a. serijmto. 765,718.

To all whom it may concern:

Be it known that I, JQSEPHF. Someone, a citizen of the United States, and resident of Two Rivers, in thecounty of Manitowoc and State of Wisconsin, have invented certain new and useful Improvements in Thermal Circuit-Closers; and I do hereby declare that the following is a full", clear, and exact description thereof.

My invention consists in what is herein particularly set forth with reference to the accompanying drawings and pointed out in the claims of this specification.

' Like in my now allowed application Serial No. 747,149, filed February 8, 1913, the object of the present invention to provide simple, economical and eflicient thermal circuit-closers of the fusible type and which are a pli'cable as parts of automatic electricsigna ing apparatus to be individually operative in the event of an increase of temperature in the vicinity thereof beyond a predetermined degree, the construction of said circuit-closers being such as to facilitate p testing of a line in which any one of the same is utilized.

Figure l of the drawings represents a sectional view of a fusible thermal circuitcloser in accordance with my invention attached to a support, the plane of the section being indicated by line 1--].' in the other illustrations; Fig. 2, a front elevation o the same partly broken away, and Fig. 3, a rear elevation of said circuit-closer.

Referring by numerals to the drawings, 4 indicates an insulator-block, circular or otherwise, the front of which is countersunk and provided with a central recess 5 of suitable dimensions between apertures 6 through which extendscrews 7 by which said block is attached to a su port. The rear of the insulator-block is a so recessed parallel to its recess 5- and preferably partitioned at 8 whereby two rear recesses are provided, the

same being open at their outer ends where said block is preferably slabbed back of a partition 9 thereof that intervenes between its front and rear recesses.

Engaging the rear recessed ortion of the block are opposite right-ang e conductorbrackets 10 and these brackets are shown 9 of said block, it eing preferable to interpose a suitable waterproof material 12 between said brackets and partition. By

means of the screw 11, a spring-contact plate 13 is fastened in the recess 5 of the insulator-block to close on the screw 11', and binding-screws 14 for electric-current Patentedoct. 21, 1913.

distribution. wires 15 are provided in connection with the brackets 10. Set in the front countersink of the insulator-block and preferably against a suitable waterproof material 16 is a preferably thin brass disk 17 provided with apertures registrable with those 6 of said block forthe passage of the attaching screws aforesaid.

The partition 9 of the msulator-block is provided with an aperture 18 (shown in Fig. 3) through which to pass a tool from the rear in order to retract the spring-contact '13 from closed to open position against the disk 17, and said disk is provided with an aperture through which to solder said contact to said disk, the solder 19 being fusible at a temperature of the predeter mined degree aforesaid. Subsequent to the soldering operation, the aperture 18 in the artition 9 of the'insulator-block is preferably filled with a plug 20 of suitable waterproof material, as shown in Fig. 1. By the employment of waterproof material in the insulator-block as above specified, the C11- cuit-close'r is strictly weatherproof and" adaptable where damp or even water exists,

and the circuit-closer" is for connection in f parallel with other devices of an' electric signaling apparatus not shown.

In practice, the meltin away of the solder 19 will result in the free end of the springcontact 13 closing on the head of the opposing screw 11, and in consequence thereof to effect an energization of the electric 51gnalin apparatus. At any time it is desirab e to test the line, the screw 11 and the disk 17 or solder 19 maybe temporar ly connected by a suitable bridge apphed thereto.

I claim:

1. A thermal circuit closer comprising an insulator-block attachable to a support and provided with front and rear piarallel recesses, a pair of conductor-brac ets 1n the rear recessed portion of the block for connection with electric-current distributlonwires, a spring-contact in the front recess of said block electrically connected to one lished between said contact and cover through an aperture in the latter to normally hold the former in open circuit position, the block being apertured to provlde for the insertion of a retracting tool back of the aforesaid contact.

2. A thermal circuit closer comprising an insulator-block attachable to a support and provided with front and rear parallel recesses, a pair of conductor-brackets in the rear recessed portion of the block for connection with electric-current distributionwires, waterproof material intermediate of the brackets and block, a spring-contact in the front recessed portion of said block electrically connected to one of the brackets and opposed to an electric-conductor provided in connection with the other of said brackets, a front. recess cover, waterproof material interposed between the cover and block, similar material by which an aperture in the block back of the spring-contact is plugged, and solder by which a fusible union is established between said spring-contact and cover through an aperture in the latter to normally hold the former in open circuit position.

3. A thermal circuit-closer comprising an insulating-block provided with a front recess and a partitioned rear recess parallel to the one aforesaid, a pair of conductorbrackets in the rear recessed portion of the block in opposite directions from the partition for connection with electric-current distribution-Wires, bracket securing screws extending from within the front recess of said block, a spring-contact fastened in said front recess of the block by one of the screws to close upon the other of said screws, a recess cover, and solder by which a fusible union is established between said contact and cover through an aperture in the latter to normally hold the former in open circuit position, the block being apertured to provide for the insertion of a retracting tool back of the aforesaid contact.

4. A thermal circuit-closer comprising a forwardly countersunk insulator-block provided with a front recess and a partitioned rear recess parallel to the one aforesaid, a pair of conductor-br-..ckets in the rear recessed portion of the block in opposite directions from the partition for connection with electric-current distribution wires, a spring-contact in the front recess of said block electrically connected to one of the brackets and opposed to an electric-conduc tor provided in connection with the other of said brackets, a disk set in the countersink of the block, and solder by which a fusible union is established between said contact and disk through an aperture in the latter to normally hold the former in open circuit position, the block being apertured to provide for the insertion of a retracting-tool back of the aforesaid contact.

lln testimony that I claim the foregoing I have hereunto set my hand at Two Rivers, in the county of Manitowoc and State of Wisconsin in the presence of two witnesses.

JOSEPH F. SCHEUER. Witnesses: I

H. R. SoHwAKn, ROLAND G. BLEsnR. 

